/* ════════════════════════════════════════════════════════════════════
   VYAN — Marketing shell: the document system
   Pages read like a specification, not a landing-page template:
   numbered sections, ruled lists, figures with captions, a catalog.
   ════════════════════════════════════════════════════════════════════ */

/* ── Header ─────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,11,.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .bar {
  max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter);
  height: 58px;
  display: flex; align-items: center; gap: 28px;
}
.brand-lockup { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-lockup .mark { width: 19px; height: 19px; }
.brand-lockup .word {
  font-family: var(--disp); font-size: 13px; letter-spacing: .32em;
  color: var(--platinum); padding-left: 2px; transform: translateY(1px);
}

.site-nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.site-nav a {
  font-size: 13px; font-weight: 500; color: var(--plat-dim);
  padding: 7px 11px; border-radius: var(--r-control);
  transition: color var(--m-fast) var(--ease);
}
.site-nav a:hover { color: var(--platinum); }
.site-nav a.active { color: var(--platinum); }
.site-nav .nav-cta {
  margin-left: 12px;
  border: 1px solid var(--line-hi); color: var(--platinum);
  padding: 8px 16px; font-weight: 600;
}
.site-nav .nav-cta:hover { border-color: var(--plat-faint); }

.nav-toggle { display: none; background: none; border: 1px solid var(--line-hi); border-radius: var(--r-control); color: var(--platinum); padding: 7px 10px; margin-left: auto; font-size: 13px; }
@media (max-width: 900px) {
  .site-nav {
    display: none;
    position: absolute; top: 58px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--obsidian); border-bottom: 1px solid var(--line);
    padding: 12px var(--gutter) 18px;
    box-shadow: 0 24px 48px rgba(0,0,0,.5);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px; }
  .site-nav .nav-cta { margin: 10px 0 0; text-align: center; }
  .nav-toggle { display: block; }
}

/* ── Document overline — the masthead row (heroes open with this) ─ */
.overline {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--plat-faint);
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px; margin-bottom: 56px;
}
.overline .ember { color: var(--ember); }
@media (max-width: 640px) { .overline > span:last-child { display: none; } }

/* ── Hero ───────────────────────────────────────────────────────── */
.hero { padding: 64px 0 0; }
.hero h1 { max-width: 13ch; }
.hero .sub { margin: 28px 0 40px; max-width: 54ch; }
.hero-actions { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; }

/* ruled spec strip — budgets and facts, set like a data sheet */
.spec-strip {
  margin-top: 72px;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.spec-strip .cell {
  padding: 18px 20px 20px 0;
  border-right: 1px solid var(--line);
}
.spec-strip .cell:last-child { border-right: none; }
.spec-strip .cell + .cell { padding-left: 20px; }
.spec-strip .v { font-size: 22px; font-weight: 750; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.spec-strip .k { font-family: var(--mono); font-size: 9.5px; letter-spacing: .18em; text-transform: uppercase; color: var(--plat-faint); margin-top: 6px; }
@media (max-width: 860px) {
  .spec-strip { grid-template-columns: 1fr 1fr; }
  .spec-strip .cell { border-right: none; border-bottom: 1px solid var(--line); padding-left: 0; }
  .spec-strip .cell + .cell { padding-left: 0; }
}

/* ── Document sections ──────────────────────────────────────────── */
.doc-section { border-top: 1px solid var(--line); padding: 80px 0 96px; }
.doc-section.flush { padding-bottom: 0; }
.doc-head {
  display: flex; align-items: baseline; gap: 18px;
  margin-bottom: 56px;
}
.doc-no {
  font-family: var(--disp); font-size: 12px; letter-spacing: .1em;
  color: var(--ember);
}
.doc-title {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--plat-dim);
}
.doc-head .doc-meta { margin-left: auto; font-family: var(--mono); font-size: 10px; letter-spacing: .16em; text-transform: uppercase; color: var(--plat-faint); }
@media (max-width: 640px) { .doc-head .doc-meta { display: none; } }

/* ── Figures · product UI shown as numbered figures, not browser mockups ── */
.fig { }
.fig-frame {
  border: 1px solid var(--line);
  background: var(--graphite-2);
  border-radius: var(--r-card);
  overflow: hidden;
}
.fig-cap {
  display: flex; align-items: baseline; gap: 14px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--plat-faint);
  padding: 12px 2px 0;
}
.fig-cap .fig-no { color: var(--ember); }
.fig-cap .fig-ref { margin-left: auto; }
@media (max-width: 640px) { .fig-cap .fig-ref { display: none; } }

/* instrument panel innards for figures */
.panel-head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--plat-faint);
}
.panel-body { padding: 18px; }
.panel-row {
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
  padding: 13px 18px; border-bottom: 1px solid var(--line);
  font-size: 13.5px;
}
.panel-row:last-child { border-bottom: none; }
.panel-row .why { display: block; font-size: 12px; color: var(--plat-faint); margin-top: 3px; }

/* ── Index list · ruled feature rows (replaces icon-card grids) ─── */
.index-list { border-top: 1px solid var(--line); }
.index-row {
  display: grid; grid-template-columns: 56px 220px 1fr; gap: 28px;
  padding: 22px 0; border-bottom: 1px solid var(--line);
}
.index-row.linked { transition: background var(--m-fast) var(--ease); }
.index-row.linked:hover { background: rgba(232,232,236,.015); }
.ix-no { font-family: var(--mono); font-size: 11px; color: var(--plat-faint); padding-top: 3px; }
.ix-term { font-size: 15px; font-weight: 700; letter-spacing: -.01em; }
.ix-desc { font-size: 14px; color: var(--plat-dim); line-height: 1.6; max-width: 60ch; }
.ix-data { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; color: var(--plat-faint); text-align: right; padding-top: 4px; white-space: nowrap; }
.index-row.has-data { grid-template-columns: 56px 220px 1fr auto; }
@media (max-width: 820px) {
  .index-row, .index-row.has-data { grid-template-columns: 44px 1fr; }
  .ix-desc { grid-column: 2; }
  .ix-data { grid-column: 2; text-align: left; padding-top: 2px; }
}

/* ── Catalog · the module price list (a luxury house's tariff, not tiles) ── */
.catalog { border-top: 1px solid var(--line); }
.catalog-row {
  display: grid; grid-template-columns: 56px 240px 1fr auto; gap: 28px; align-items: baseline;
  padding: 19px 0; border-bottom: 1px solid var(--line);
  transition: background var(--m-fast) var(--ease);
  position: relative;
}
.catalog-row:hover { background: rgba(232,232,236,.018); }
.catalog-row .c-no { font-family: var(--mono); font-size: 11px; color: var(--plat-faint); }
.catalog-row .c-name { font-size: 16px; font-weight: 700; letter-spacing: -.01em; display: flex; align-items: center; gap: 9px; }
.catalog-row .c-name .arr { color: var(--plat-faint); font-size: 13px; transition: color var(--m-fast) var(--ease), transform var(--m-fast) var(--ease); }
.catalog-row:hover .c-name .arr { color: var(--ember); transform: translateX(3px); }
.catalog-row .c-claim { font-size: 13.5px; color: var(--plat-dim); max-width: 54ch; }
.catalog-row .c-price { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; color: var(--plat-dim); text-align: right; white-space: nowrap; }
@media (max-width: 860px) {
  .catalog-row { grid-template-columns: 44px 1fr auto; }
  .catalog-row .c-claim { grid-column: 2 / 4; }
}

/* ── The loop · typographic, not pills ──────────────────────────── */
.loop-track {
  display: flex; flex-wrap: wrap; align-items: baseline; column-gap: 10px; row-gap: 14px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .14em; text-transform: uppercase;
}
.loop-track .node {
  color: var(--plat-faint);
  padding-bottom: 6px;
  border-bottom: 1px solid transparent;
  transition: color .4s var(--ease), border-color .4s var(--ease);
}
.loop-track .node.lit { color: var(--platinum); border-bottom-color: var(--ember); }
.loop-track .sep { color: var(--line-hi); font-size: 11px; }

/* ── Pull quote ─────────────────────────────────────────────────── */
.proof { border-left: 1px solid var(--ember); padding: 4px 0 4px 28px; }
.proof p { font-size: clamp(18px, 2.2vw, 24px); font-weight: 550; line-height: 1.45; letter-spacing: -.015em; max-width: 30ch; text-wrap: balance; }
.proof cite { display: block; margin-top: 14px; font-style: normal; font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--plat-faint); }

/* ── Pricing tier ───────────────────────────────────────────────── */
.tier { position: relative; display: flex; flex-direction: column; background: var(--graphite-2); border: 1px solid var(--line); border-radius: var(--r-card); padding: 28px; }
.tier .tier-name { font-weight: 750; font-size: 16px; letter-spacing: -.01em; }
.tier .tier-for { font-size: 12.5px; color: var(--plat-faint); margin-top: 4px; }
.tier .tier-price { margin: 22px 0 4px; font-size: 36px; font-weight: 750; letter-spacing: -.025em; font-variant-numeric: tabular-nums; }
.tier .tier-price small { font-size: 12.5px; font-weight: 500; color: var(--plat-faint); letter-spacing: 0; }
.tier ul { list-style: none; margin: 20px 0 26px; display: grid; gap: 10px; }
.tier ul li { font-size: 13px; color: var(--plat-dim); padding-left: 18px; position: relative; line-height: 1.5; }
.tier ul li::before { content: ""; position: absolute; left: 0; top: 8px; width: 7px; height: 1px; background: var(--ember); }
.tier .btn { margin-top: auto; }
.tier.flag { border-color: rgba(201,162,63,.4); }
.tier .flag-tag {
  position: absolute; top: -1px; right: 24px;
  font-family: var(--mono); font-size: 9px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--ember); border: 1px solid rgba(201,162,63,.4); border-top: none;
  border-radius: 0 0 var(--r-chip) var(--r-chip);
  padding: 5px 10px;
}

/* ── Closing section ────────────────────────────────────────────── */
.cta-band { border-top: 1px solid var(--line); padding: 110px 0; }
.cta-band h2 { max-width: 18ch; margin-bottom: 18px; }
.cta-band .sub { margin-bottom: 38px; }

/* ── Footer · ruled columns over the ghost wordmark ─────────────── */
.site-footer { border-top: 1px solid var(--line); padding: 68px 0 0; overflow: hidden; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 0; }
.footer-grid .col { padding: 0 28px; border-left: 1px solid var(--line); }
.footer-grid .col.footer-brand { border-left: none; padding-left: 0; }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; row-gap: 44px; }
  .footer-grid .col { border-left: none; padding: 0; }
}
.footer-grid .col h4 {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--plat-faint); font-weight: 500; margin-bottom: 18px;
}
.footer-grid .col a { display: block; font-size: 13px; color: var(--plat-dim); padding: 5px 0; transition: color var(--m-fast) var(--ease); }
.footer-grid .col a:hover { color: var(--platinum); }
.footer-brand .motto {
  font-family: var(--disp); font-size: 10.5px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--plat-dim); margin: 18px 0 12px;
}
.footer-brand p { font-size: 12.5px; color: var(--plat-faint); max-width: 280px; line-height: 1.7; }
.footer-legal {
  margin-top: 56px; padding: 20px 0;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .12em; color: var(--plat-faint);
}
.footer-ghost {
  font-family: var(--disp);
  font-size: clamp(90px, 17vw, 230px);
  letter-spacing: .08em;
  line-height: .72;
  color: var(--ghost);
  text-align: center;
  user-select: none;
  pointer-events: none;
  transform: translateY(14%);
}

/* ── Interior page hero ─────────────────────────────────────────── */
.page-hero { padding: 64px 0 72px; }
.page-hero h1 { max-width: 16ch; }
.page-hero .sub { margin-top: 24px; }

.backlink { font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--plat-faint); }
.backlink:hover { color: var(--ember); }
.spec-k { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--plat-faint); white-space: nowrap; }

/* ── Mobile rhythm — sections breathe tighter on small screens ──── */
@media (max-width: 640px) {
  .hero { padding: 40px 0 0; }
  .hero .sub { margin: 22px 0 32px; }
  .overline { margin-bottom: 40px; }
  .doc-section { padding: 56px 0 64px; }
  .doc-head { margin-bottom: 36px; }
  .spec-strip { margin-top: 48px; }
  .cta-band { padding: 72px 0; }
  .page-hero { padding: 44px 0 52px; }
  .site-footer { padding-top: 52px; }
  .footer-legal { flex-direction: column; gap: 8px; }
  .hero-actions { width: 100%; }
  .hero-actions .btn-gold, .hero-actions .btn { width: 100%; justify-content: center; }
}